The scion of a family that made a fortune in chewing gum is moving into pot. William Wrigley Jr. II, who helped orchestrate the sale of his family’s business to Mars Inc. in 2008, led a $65 million investment round for Surterra Wellness, a medical cannabis startup in Georgia with licenses to operate in Florida and Texas. The funding brings the total raised so far to $100 million, according to Surterra. Wrigley, 54, who left…